Power head for pumps



Jan. 7, 1930. E. B. FUQUA 1,742,205

POWER HEAD FOR PUMPS Filed P 1928 2 Sheets-Sheet l f/-wra/ [da/a/v/ 5. /5 0a iyawvzr Jan. 7, 1930. E, B, FU A 1,742,205

POWER HEAD FOR PUMPS Filed Sept. 24, 1928 2 Sheets-Sheet 2 Erin r04 fdalard f2 (1a 8 rramvsr Patented Jan. 7,1930

UNITED STATES hown;

' be secured-.5

understood from EDWARD B. FUQUA, OF MEMIBH IS, TENNESSEE POWER HEAD non ruins" Application hid'septemter 24, 1s'2s.""s'eria1 No. 308,021.

This invention relates to improvements in power heads for. pumps and especially to a power head for operating a vertically disposed reciprocating-pump. i i Among the obj ectsof-this invention are:

(m) To provide a casing inwhich-oil may be retained to efiiciently lubricate the. device;

6) To providemeans-for vertically guiding the parts carryingthepump rod head;

(a) To provide means for compensating a slight lack of parallelism in the movement of the power head parts and the pump rod;

To provide a slow upward movement and quick return downward movement or the reverse 1; 5 1 L p (e)- To provide means whereby the pump rod may be removedor replaced without disturbing the power .head;and; i y L (f) Towprovidea simple and efiicient mechanism having a minimum number of working parts, which parts are soassembled as to give the greatest possible efliciencyaq The means by which the; foregoing and other objects are accomplishedand the man nerjof their accomplishment. will; readily be the ;.followii1g specification on reference .to the accompanying drawings, in whichz. a. 1. .L r

Fig. 1, is a front elevation ofthe casing and parts iwith the upper end oflthe pump. rod broken away in -order that the vertical guiding. action, may be more. clearly Fig. 2, is a Sectional side elevation taken on the line II..I;I of F ig 1,.lookinginthe direction of the arrows.

,Fig 3,.. a t on 0n line .I o Fi 2, lQQkingin. th direction of the arrows. V p

FigL4,isaplan. f y ;Referring now' to the drawings, 10 is a hollow-casing preferably rectangular in plan, in the front of which easing is "a-Vertically disposed slot'll, having guideways- 12 disposedon the sides thereof. 131s ahollow boss preferably integral with: the Leasing, in whichithe-upper end of the pumppipe may 114: is the :pump rod? which preferably has a reducedlsection 15, adjacent itsiupperyenda A power and the lower portion of the casing which pins swinging 1518 05880131; rates are P and. 1t. L -t a1:ms 18 .and 19 respectively are journalled.

The pp r tad; of. th e m s=a ar IlgZ i- -W t ngi 1' -u na led a pi 2 whi proj c s 1 5mm; t ei e pfa seam? n is, eccentrically disposed relatively to, the center of the gear. 23 is. a ,tubularhub projecting forwardly from the gear 22 substantially flushwith the frontof the guides 1 -1 M -p i s ng w th the sear 22, which pinioni is secured to a shaft 25, @The shaft 25, is.journalledina bearingQGcarrgied by the upper end: of; the arm 19, projects beyond. said bearing and carries a belt pulley 27 whicl1 may be driven through a belt 28froin any suitable source ofpower. 29 is agradius m loneten of; v h i n t r un the hub. 23, and the other end. around the, pin 25 to hold the gearand pinion in mesh.

.30 is a collar preferably in the form of a ball hearing which encircles the front of the hub 23 and serves to guide the hub in the gnideways is a pin which may; be removably placed. in: the. tubular hu b 23,

whichgpiniis preferably integral. with and projects rearwardly from vertically disposed plate 32, fromthe upper elndofwhich plate, a boss 33,projects forwardly. This boss 33 together with a cap 3l preferably held in place by set screws 35 forn ish a head or clamp for engaging. the upper end, of the pump rod 14. 36 is a cover plate which may be securedto the guideways 12,, .asby the cap screws 37, which cover plate forms apocket into which thelower end o f tlleclamp plate 32 may descend). I i, l, 5 r Preferably the lower portion of the case, up to substantially the bottom -of the slot 11, is filledwith oil and-this cover plate serves as a splash plate to preventloss of the oil from splashing. r

' In use, the power head casing is set up with the j boss .13. disposed about the, pump rod 14; and the. pump...pi.pe. connected to Ithe boss insuchfamanner as maybe desired. The pulley 27 iswbelted to ;a suitablesourceof portion I of the casing filled with oil 4 H en power is turned on, the pulley is revolved in the direction of the arrow A, causing the gear to turn in the direction of the arrow B. During this turning, the gear revolves around the pin 21, raising the gear hub in so doing, the gear hub being constrained by the guideways 12 to travel in a vertical path. As the hub rises, the pin 21 swings laterally toward the guideways until the hub reaches its upper limit of travel beingthen in the position shown in Fig. 3, with the pin directly beneath the gear hub. As the ma tion continues, the pin swings laterally until it reaches the position 21A (Fig. 1) at which time the hub -23 will have descended to the original central position shown in Fig. '1. Further rotation of the gear causes the hub to descend to its lowest-position substantially the position 23A of Fig. 3, mediately to begin to rise again. During this movement the pinion 24 is held in mesh by the radius arm 29, the lateral movement of the pinion being taken care of by the swinging arm 19. i

It will be especially noted, that during the up stroke the distance from the pin 21, around which the gearturns, to the pinion 24 is greatest, whereas on the down stroke this distance reaches a minimum, so that a slow upward motion of the pump rod is obtained and a quick downward motion. Should it be desirabletoreverse this action and-obtain a slow downward stroke and quick upward stroke it is only necessary to reverse the direction of rotation of the pulley 27. During these movements the swinging movement of the arms 18 and 19 provides a laterally shifting bearing for each of the two pins used. 7

' It will be noted that the gear dipslow in the oil when the hub is at the position 23A, its lowest position, and thatthe oil picked up by the gear will be'effectually carT ried upward and lubricate all the parts of the device within the casing.

Should the casing and pump rod be laterally slightly out of alignment, the pin 31 may turn in theihub-to compensate for such lack of alignment. I It willbe noted that the swinging arms 18 and'19, the bearings about which they turn, and the bearings carried by them, are'of relatively great depth, so that such rigidity as may be desired may be obtained by them. 'Having fully described my invention, wh at lclaimis: y

' 1. A power head fora pump, including a casing having a vertically disposed slot through the front thereof providing a guideway, a gear, having a tubular hub projecting through said opening and guided by said guideway, aneccentrically disposed pin projecting from said gear, a laterally shiftable'bearing for said pin and means for rotating said gear, whereby said'hub' willbe vertically reciprocated. 1

and im- 2. A power head for a pump, including a casing having a vertically disposed slot through the front thereof providing a guide way, a gear, having a tubular hub projecting through said opening and confined to a vertical path by said guide way, an eccentrically disposed pin projecting from said gear, a laterally swinging bearing for said pin. and means for rotating said gear, wherebyv said hub will be vertically recipro cated.

, 3. A power head for a pump, including a casing having a vertically disposed opening through'the front-thiereof providing a guide way, a gear, having a tubular hub projecting through said opening and confined to a vertical pathby saidguideway, an eccentrically disposed pin projecting from said gear, a laterally shiftablebearing for said pin, a

pinion meshing with andlaterally disposed with reference to said gear, and. means for rotating'said pinion, whereby said hub will be vertically reciprocated at unequal upward and downward speeds. Y i 4. A'power head fora pump, including a casing having the lower portion thereof forming an oil reservoir and having a vertically disposed slot through the front thereof providing a 'guideway, a gear depending into said reservoir and having a tubular hub projecting through said opening and confined to a vertical-path by *saidguideway, an eccentrically disposed pin projecting from said gear, a laterally shiftable bearing for said pin and means for rotating said gear, whereby said tubular hub will be vertically reciprocated. I i

5. A power head for a pur'np, including a casing of which the lower portion forms an oil reservoir, said casing having a vertically disposed slot'through the front thereof providing a guideway, a cover disposed around the lower portion of said slot, a gear having a tubular hub projecting through said opening and confined to a vertical path by said guideway, an eccentrically disposed pin projecting from said gear, a laterally shiftable bearing for said pin and means for rotating said gear, whereby said tubularrhub will be vertically reciprocated, a pump rod clamp, an integral plate behind and projecting downwardfrom said clamp and an integral pin projecting rearwardly from said plate into said hub.

6. A power head for a pump,rincluding a casing of which thelower portion forms an oil reservoir, said casing having a vertically disposed slot through the front thereof providing a guideway, a-gear, having a tubular hub projecting through said opening and confined to a vertical path by said guideway, means for rotating said gear, whereby said hub will be vertically reciprocated, a pump rod clamp, a plate behind said clamp, secured thereto and projecting downward therefrom,

said hub, a pinion meshing with said gear,

a radius arm holding said pinion and gear in mesh, an eccentrically disposed pin projecting from said gear, a bearing for said pin, a laterally swinging arm carrying said bearing, a bearing for said pinion, a laterally swinging ,arm carrying said bearing and means for rotating said pinion, whereby said clamp will be vertically reciprocated at unequal upward and downward speeds.

8. A power head for a pump, comprising a casing having a vertically disposed slot through the front thereof providing a guideway, a gearhaving a hub projecting through said slot. and confined to a vertical path bysaid guideway, a pump rod clamp carried by said hub, a pinion meshing with said gear, a radius arm holding said pinion and gear in mesh, an eccentrically disposed pin projecting from said gear, a bearing for said pin, a laterally swinging arm carrying said bearing, a pinion shaft to which said pinion is secured, a bearing for said pinion shaft, be-

yond which said shaft proJects, a laterally swinging arm carrying said bearing, and a pulley secured on said pinion shaft, whereby said clamp. may be vertically reciprocated at unequal upward and downward speeds.

9. A power head for a pump, comprising a casing having a vertically disposed slot through the front thereof providing a guideway, a gear having a hub projecting through said slot and confined to a vertical pathby said guideway, a pump rod clamp carried by said hub, a pinion meshing with said gear,

a radius arm holding said pinion and gear in mesh, an eccentrically disposed pin projecting from said gear, a bearing for said pin,

means for swinging said bearing laterally, a bearing for said pinion, means for laterally swinging said bearing, and means for rotat ing saidpinion, whereby said hub will be vertically reciprocated with a slow upward and rapid downward motion.

i In testimony whereof I hereunto afliX my signature.

EDWARD B. FUQUA. 

